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Growth and mortality of a main tree species after disturbance in Japanese northern forest: Effect of competition as a long-lasting stress

Research Project

Project/Area Number 26450205
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Forest science
Research InstitutionHokkaido Research Organization

Principal Investigator

OHNO YASUYUKI  地方独立行政法人北海道立総合研究機構, 森林研究本部林業試験場, 主査 (30414246)

Co-Investigator(Kenkyū-buntansha) 渡邊 陽子  北海道大学, 農学研究院, 研究員 (30532452)
梅木 清  千葉大学, 大学院園芸学研究科, 准教授 (50376365)
吉田 俊也  北海道大学, 北方生物圏フィールド科学センター, 教授 (60312401)
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords肥大成長 / 年輪幅指数 / 個体間競争 / 食葉性昆虫 / 素因 / 死亡 / ウダイカンバ / 気候応答 / 局所的競争効果 / 攪乱 / ウダイカンバ二次林 / 針広混交林
Outline of Final Research Achievements

To clarify mortality pattern of Betula maximowicziana Regel (monarch birch) after the outbreak of herbivores insects in 2011, we analyzed the individual diameter growth (GD) in the period prior to the outbreak and the subsequent mortality (2012-2014). Individual GD were affected by the competition from neighbors and initial tree size: GD decreased with increasing asymmetric competition from Quercus crispula Blume (mizu oak) and with decreasing initial size. The growth reduction of monarch birch was imposed by asymmetrical competition from larger mizu oak, indicating that larger mizu oak might cause a reduction of light resources to monarch birch. During the three-year period after the outbreak, 17% of the observed trees died. Logistic regression analysis revealed that mortality rate increased with decreasing GD. These results suggest that the competition was an underlying stress factor that reduced the growth and raised the mortality after the outbreak.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (1 results)

All 2015

All Presentation (1 results)

  • [Presentation] 食葉性昆虫の大規模食害により失葉した樹木の肥大成長と木部構造2015

    • Author(s)
      渡辺陽子、大野泰之
    • Organizer
      第126回日本森林学会大会
    • Place of Presentation
      北海道大学
    • Year and Date
      2015-03-26 – 2015-03-29
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2018-03-22  

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